Here in Germany it is absolutely not usual to declaw cats -there is not even an own word for it. Of course my 2 indoor boys attack some of the furniture: one wooden doorframe (not all the others) and the sofa (because we weren't quick enough to train them not to), If a new piece of furniture comes in and we see they try then it is best to de-courage them (I use a small water pistol ) and to offer other scratching possibilities -then it works well. One of the dozens of nicknames for Filou is Little Dragon Claw and he likes it.